package main

import (
	"fmt"
	"time"
)

func rotate(matrix [][]int) {

}

func main() {
	start := time.Now()
	matrix := [][]int{{5, 1, 9, 11}, {2, 4, 8, 10}, {13, 3, 6, 7}, {15, 14, 12, 16}}
	rotate(matrix)
	cost := time.Since(start)
	fmt.Println(matrix)
	fmt.Println(cost)

}
